@incollection{, 74F1B12F9E6A464050E89AF73A560F6D , author={{Gadi DungPaul} and {Department of Business Administration and Management, Plateau State Polytechnic Barkin Ladi}}, journal={{Global Journal of Management and Business Research}}, journal={{GJMBR}}2249-45880975-585310.34257/GJMBR, address={Cambridge, United States}, publisher={Global Journals Organisation}1523138 } @incollection{b0, , title={{Consumer evaluations of sales promotion: the effect on brand choice}} , author={{ AlvarezAlvarez } and { BVásquez Caesiellus } and { R }} , journal={{European Journal of Marketing}} 39 , year={2010} } @incollection{b1, , title={{The relationship between sale promotions, duration of receiving rewards and customer preference: a case study on financial products}} , author={{ KBoonlertvanic }} , journal={{Journal of Academy of Business and Economics}} 10 1 , year={2010} } @book{b2, , title={{Principles of Marketing}} , author={{ FBrassington } and { SPettit }} , year={1997} , 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